WO2005090253A2 - Coating material and a fiber optic sensor in which this coating material is used - Google Patents

Coating material and a fiber optic sensor in which this coating material is used Download PDF

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Publication number
WO2005090253A2
WO2005090253A2 PCT/IB2005/050936 IB2005050936W WO2005090253A2 WO 2005090253 A2 WO2005090253 A2 WO 2005090253A2 IB 2005050936 W IB2005050936 W IB 2005050936W WO 2005090253 A2 WO2005090253 A2 WO 2005090253A2
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WO
WIPO (PCT)
Prior art keywords
coating material
peg
fiber optic
core
sensor
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Application number
PCT/IB2005/050936
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French (fr)
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WO2005090253A3 (en
Inventor
Halime Usta Yogun
Yavuz Ercil
Yusuf Menceloglu
Naci Inci
Original Assignee
Arcelik Anonim Sirketi
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Publication of WO2005090253A2 publication Critical patent/WO2005090253A2/en
Publication of WO2005090253A3 publication Critical patent/WO2005090253A3/en

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
    • C03C25/66—Chemical treatment, e.g. leaching, acid or alkali treatment
    • C03C25/68—Chemical treatment, e.g. leaching, acid or alkali treatment by etching
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/28—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the compounds used containing active hydrogen
    • C08G18/40—High-molecular-weight compounds
    • C08G18/48—Polyethers
    • C08G18/4833—Polyethers containing oxyethylene units
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
    • C08G18/00—Polymeric products of isocyanates or isothiocyanates
    • C08G18/06—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen
    • C08G18/70—Polymeric products of isocyanates or isothiocyanates with compounds having active hydrogen characterised by the isocyanates or isothiocyanates used
    • C08G18/71—Monoisocyanates or monoisothiocyanates
    • C08G18/718—Monoisocyanates or monoisothiocyanates containing silicon
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
    • C09D175/00—Coating compositions based on polyureas or polyurethanes; Coating compositions based on derivatives of such polymers
    • C09D175/04—Polyurethanes
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/7703—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/7703—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides
    • G01N2021/7706—Reagent provision
    • G01N2021/7709—Distributed reagent, e.g. over length of guide
    • G01N2021/7716—Distributed reagent, e.g. over length of guide in cladding
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/7703—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides
    • G01N2021/7706—Reagent provision
    • G01N2021/7723—Swelling part, also for adsorption sensor, i.e. without chemical reaction
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/7703—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator using reagent-clad optical fibres or optical waveguides
    • G01N2021/7706—Reagent provision
    • G01N2021/773—Porous polymer jacket; Polymer matrix with indicator
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N2021/775—Indicator and selective membrane
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N2021/7769—Measurement method of reaction-produced change in sensor
    • G01N2021/7776—Index
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • G01N21/81—Indicating humidity

Definitions

  • This invention relates to a coating material coated on organic and/or inorganic surfaces and a fiber optic sensor, in which this coating material is used.
  • Various problems arise in coating of the surface of glass or plastic fiber optic and especially PolyMethylMethAcrylate (PMMA) materials with sensor materials especially the material PolyEthyleneGlycol (PEG).
  • PMMA PolyMethylMethAcrylate
  • PEG PolyEthyleneGlycol
  • the PMMA material can not be coated permanently with the PEG material used as sensor material in fiber optic humidity sensors because it dissolves in water easily.
  • the British Patent No 977820 describes the coating of glass panels by a compound containing ethylenic carboxyl acid amide copolymer.
  • the British Patent No 1026499 describes the coating of glass fiber optic surface by a saturated, polyester, water insoluble material.
  • the object of this invention is the realisation of a coating material providing the coating of organic and/or inorganic surfaces with sensor materials that are especially easily soluble in water.
  • Another object of this invention is the realisation of a fiber optic sensor coated with a sensor produced using the coating material.
  • a fiber optic sensor in which the coating material realised to reach the objectives of this invention is used, is shown in the attached figures, whereby, [009] Figure 1 - is the schematic view of a fiber optic sensor.
  • the coating material which is the object of the present invention comprises sensor material affected by the changes in humidity, temperature, pressure and other similar quantities, and, because of this characteristic of sensor material, a binding group enabling the coating of the sensor material used in fiber optic sensors (1) on organic or inorganic surface with an adhesive effect.
  • the binding group has an adhesive effect and trialkoxy silane is used as binding group; and gamma - isocyanatopropyltriethoxysilane is preferably used.
  • sensor material oligomer and/or polymer materials sensitive to different chemicals with the endings hydroxyl, amino, thiol, carboxyl, can be used.
  • polyethyleneglycol (PEG) having a humidity holding characteristic is used as sensor material.
  • the humidity of the PEG material is removed in toluene solvent by dean-stark distillation method.
  • the PEG from which the humidity has been removed and toluene solution is processed with gamma - isocyanatopropyl- triethoxysilane which has an adhering effect and is used as binding group.
  • hydroxyl (OH) groups in the PEG material with hydroxyl ending reacts with gamma - isocyanatopropyltriethoxysilane of the trialkoxy silane groups used as binding group and as a result of this reaction, trialkoxy silane groups are bound to the ends of PEG chains with urethane bond.
  • Coating material whose end groups are trialkoxy silane is obtained by combining PEG with gamma - isocyanatopropyltri- ethoxysilane.
  • the general formula of the PEG combination of the coating material which is the object of the present invention, having end groups covered by trialkoxy silane created as a result of the reaction of PEG with gamma - isocyanatopropyltri- ethoxysilane is given below:
  • the fiber optic sensor (1) in which the coating material, the object of the invention is used comprises a core (2) used as light transmission line, a cladding (3) wrapping the core (2) all around, the refraction index of which is smaller than the refraction index of the core (2), a detector (4) produced of a coating material that can be coated on organic/inorganic surfaces completely, a transmitter (5) used as light source and a receiver (6) sensing the light.
  • Detectors (4) used in fiber optic sensors (1) with which different quantities can be sensed, can be obtained by changing the sensor material contained in the coating material.
  • a core (2) obtained preferably from PMMA material is used.
  • the section between the core (2) and the cladding (3) wrapping the core (2) all around is etched partially or completely using different methods and a section to be coated by the detector (4) is uncovered.
  • the detector (4) made of PEG coating material with the end groups covered by trialkoxy silane can easily be coated permanently by making cross bond on PMMA material using coating methods spray method, solvent coating, electrospray coating and dipping.
  • the detector (4) is coated preferably by applying the dip coating method.
  • the light entering the core (2) from the transmitter(5), preferably monochromatic, used as light source can not go out of the core (2) since the refraction index of the cladding (3) surrounding the core (2) is smaller than the refraction index of the core (2) and being reflected from the cladding (3) it advances in the core (2). During this advancement, the light passes through also by being reflected from the detector (4).
  • the refraction index of the detector (4) is greater than the refraction index of the core (2)
  • the light advancing by reflecting in the core (2) does not reflect from the detector (4) whose refraction index becomes greater than the refraction index of the core (2), and is disseminated to the environment being refracted with a certain angle.
  • the amount of light sensed by the receiver (6) located at one end of the fiber optic relatively decreases.
  • the refraction index of the detector (4) is smaller than the refraction index of the core (2) (e.g.
  • the normalized refraction index difference for the core and cladding is nearly at the level of 0.1% - 0.3%) the amount of light passing through the detector (4) by being refracted relatively increases. Consequently, the amount of light sensed by the receiver (6) located at one end of the fiber optic changes depending on the humidity concentration.
  • the detector (4) which is the object of the invention enables in sensors, especially optical and fiber optic sensors (1), the complete coating of the sensor material on organic / inorganic surfaces. Resulting from coating of the PEG material, easily soluble in water and used in humidity sensors because of its humidity holding characteristic, on fiber optic permanently, fiber optic sensor (1) can be used for sensing of humidity effectively.
  • the coating material which is the object of the present invention long lasting adhesion of the sensor material on organic / inorganic surfaces is provided.
  • the detector (4) obtained from this coating material is used in fiber optic sensors - especially fiber optic humidity sensors - effectively.

Abstract

This invention relates to a coating material comprising of sensor material affected by the changes in humidity, temperature, pressure and other similar quantities, and, because of this characteristic of sensor material, a binding group enabling the coating of the sensor material used in fiber optic sensors (1) on organic or inorganic surface with an adhesive effect, and a fiber optic sensor (1) where this coating material is used.

Description

Description COATING MATERIAL AND A FIBER OPTIC SENSOR IN WHICH THIS COATING MATERIAL IS USED
[001] This invention relates to a coating material coated on organic and/or inorganic surfaces and a fiber optic sensor, in which this coating material is used. [002] Various problems arise in coating of the surface of glass or plastic fiber optic and especially PolyMethylMethAcrylate (PMMA) materials with sensor materials especially the material PolyEthyleneGlycol (PEG). Especially the PMMA material can not be coated permanently with the PEG material used as sensor material in fiber optic humidity sensors because it dissolves in water easily. [003] In the state of the art, the British Patent No 954574 describes the coating of glass surfaces by CH2=CR.COO(CH2)Si(ORl) acid compounds. [004] In another known embodiment of the art, the British Patent No 977820 describes the coating of glass panels by a compound containing ethylenic carboxyl acid amide copolymer. [005] Yet in another known state of the art, the British Patent No 1026499 describes the coating of glass fiber optic surface by a saturated, polyester, water insoluble material. [006] The object of this invention is the realisation of a coating material providing the coating of organic and/or inorganic surfaces with sensor materials that are especially easily soluble in water. [007] Another object of this invention is the realisation of a fiber optic sensor coated with a sensor produced using the coating material. [008] A fiber optic sensor in which the coating material realised to reach the objectives of this invention is used, is shown in the attached figures, whereby, [009] Figure 1 - is the schematic view of a fiber optic sensor.
[010] Parts shown in figures are numbered as follows: 1. Fiber optic sensor 2. Core 3. Cladding 4. Detector 5. Transmitter 6. Receiver
[011] The coating material which is the object of the present invention comprises sensor material affected by the changes in humidity, temperature, pressure and other similar quantities, and, because of this characteristic of sensor material, a binding group enabling the coating of the sensor material used in fiber optic sensors (1) on organic or inorganic surface with an adhesive effect.
[012] The binding group has an adhesive effect and trialkoxy silane is used as binding group; and gamma - isocyanatopropyltriethoxysilane is preferably used.
[013] And as sensor material oligomer and/or polymer materials sensitive to different chemicals with the endings hydroxyl, amino, thiol, carboxyl, can be used. In the preferred embodiment of the invention, polyethyleneglycol (PEG) having a humidity holding characteristic is used as sensor material.
[014] While preparing the coating material, the humidity of the PEG material is removed in toluene solvent by dean-stark distillation method. The PEG from which the humidity has been removed and toluene solution is processed with gamma - isocyanatopropyl- triethoxysilane which has an adhering effect and is used as binding group. During this process, hydroxyl (OH) groups in the PEG material with hydroxyl ending reacts with gamma - isocyanatopropyltriethoxysilane of the trialkoxy silane groups used as binding group and as a result of this reaction, trialkoxy silane groups are bound to the ends of PEG chains with urethane bond. Coating material whose end groups are trialkoxy silane is obtained by combining PEG with gamma - isocyanatopropyltri- ethoxysilane. The general formula of the PEG combination of the coating material which is the object of the present invention, having end groups covered by trialkoxy silane created as a result of the reaction of PEG with gamma - isocyanatopropyltri- ethoxysilane is given below:
[015]
Figure imgf000003_0001
[016] As a result of this reaction, coating of the sensor material included in the coating material on organic and/or inorganic surfaces e.g. PMMA material from which fiber optic sensors are produced, is possible. The coating material can be coated on silica glass material, too.
[017] In an embodiment of the invention, 3.75 m ol. PEG material with hydroxyl ending is dissolved in 180 ml. toluene solvent. This solution is subjected to dean-stark distillation process for 3 hours and the humidity trapped in the PEG material is removed from the material. The coating material is obtained by processing the PEG, toluene solution from which the humidity is removed, by processing with 7.5 mmol. gamma - isocyanatopropyltriethoxysilane at approximately 50 degrees C for a certain time. [018] The fiber optic sensor (1) in which the coating material, the object of the invention is used, comprises a core (2) used as light transmission line, a cladding (3) wrapping the core (2) all around, the refraction index of which is smaller than the refraction index of the core (2), a detector (4) produced of a coating material that can be coated on organic/inorganic surfaces completely, a transmitter (5) used as light source and a receiver (6) sensing the light. Detectors (4) used in fiber optic sensors (1) with which different quantities can be sensed, can be obtained by changing the sensor material contained in the coating material.
[019] In the fiber optic sensor (1), a core (2) obtained preferably from PMMA material is used. The section between the core (2) and the cladding (3) wrapping the core (2) all around is etched partially or completely using different methods and a section to be coated by the detector (4) is uncovered. On this section made by etching the cladding (3), the detector (4) made of PEG coating material with the end groups covered by trialkoxy silane can easily be coated permanently by making cross bond on PMMA material using coating methods spray method, solvent coating, electrospray coating and dipping. The detector (4) is coated preferably by applying the dip coating method.
[020] The light entering the core (2) from the transmitter(5), preferably monochromatic, used as light source can not go out of the core (2) since the refraction index of the cladding (3) surrounding the core (2) is smaller than the refraction index of the core (2) and being reflected from the cladding (3) it advances in the core (2). During this advancement, the light passes through also by being reflected from the detector (4).
[021] When the humidity concentration in the environment where the fiber optic sensor (1) is placed changes, optical characteristics thus the refraction index of the sensor material change, too, and cause the amount of light passing through the core (2) to increase or decrease, and the humidity concentration of the environment is determined by the amount of light that can pass through the core (2) of the fiber optic.
[022] For example, when the humidity concentration of the environment decreases, the optical characteristic and consequently the refraction index of the detector (4) produced of coating material containing PEG possessing humidity holding characteristic, changes.
[023] In the case when the refraction index of the detector (4) is greater than the refraction index of the core (2), the light advancing by reflecting in the core (2) does not reflect from the detector (4) whose refraction index becomes greater than the refraction index of the core (2), and is disseminated to the environment being refracted with a certain angle. In this case, the amount of light sensed by the receiver (6) located at one end of the fiber optic, relatively decreases. In the case when the refraction index of the detector (4) is smaller than the refraction index of the core (2) (e.g. the normalized refraction index difference for the core and cladding is nearly at the level of 0.1% - 0.3%) the amount of light passing through the detector (4) by being refracted relatively increases. Consequently, the amount of light sensed by the receiver (6) located at one end of the fiber optic changes depending on the humidity concentration.
[024] The detector (4) which is the object of the invention enables in sensors, especially optical and fiber optic sensors (1), the complete coating of the sensor material on organic / inorganic surfaces. Resulting from coating of the PEG material, easily soluble in water and used in humidity sensors because of its humidity holding characteristic, on fiber optic permanently, fiber optic sensor (1) can be used for sensing of humidity effectively.
[025] With the coating material which is the object of the present invention, long lasting adhesion of the sensor material on organic / inorganic surfaces is provided. The detector (4) obtained from this coating material is used in fiber optic sensors - especially fiber optic humidity sensors - effectively.

Claims

Claims
[001] A coating material comprising sensor material coated on organic and / or inorganic surfaces consisting of oligomer and / or polymer material sensitive to different chemicals with the endings hydroxyl, amino, thiol, carboxyl having a structure affected by the changes in humidity, temperature, pressure and other similar quantities, and a binding group enabling the coating operation by exhibiting adhesion effect during coating of the sensor material on the organic or inorganic surface, characterized by the fact that the binding group is trialkoxy silane.
[002] A coating material as in Claim 1 characterized by sensor material comprising polyethyleneglycol (PEG).
[003] A coating material as in Claim 1 characterized by binding group comprising gamma - isocyanatopropyltriethoxysilane.
[004] A coating material as in Claim 1 obtained by mixing PEG with a solvent and letting it rest in this solvent for a certain time, processing PEG and toluene solution with gamma - isocyanatopropyltriethoxysilane which is used as binding group and thus combining PEG with gamma - isocyanatopropyltriethoxysilane.
[005] A coating material as in Claim 1 obtained by dissolving 3.75 mmol. PEG material with hydroxyl ending in 180 ml. toluene solvent, removing the humidity of this solution for 3 hours, processing the PEG and toluene solution with 7.5 mmol. gamma - isocyanatopropyltriethoxysilane at approximately 50 degrees C for a certain time.
[006] A fiber optic sensor (1) comprising a core (2) used as light transmission line, a cladding (3) wrapping the core all around and the refraction index of which is smaller than the refraction index of the core (2), a transmitter (5) used as light source and a receiver (6) sensing the light, characterized by a detector (4) produced of a coating material as in Claims 1 to 5 coated on the section created by etching the cladding (3) partially or completely.
[007] A fiber optic sensor (1) as in Claim 6 characterized by the core (2) obtained from PMMA material.
[008] A fiber optic sensor (1) as in Claim 6 characterized by the core (2) obtained from silica glass material.
PCT/IB2005/050936 2004-03-17 2005-03-17 Coating material and a fiber optic sensor in which this coating material is used WO2005090253A2 (en)

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TR2004/00535 2004-03-17

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100451629C (en) * 2006-08-17 2009-01-14 中国船舶重工集团公司第七二五研究所 Preparation of optical fiber humidity sensor sensing membrane
US8837887B2 (en) 2011-08-03 2014-09-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Waveguide and connecting element

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0481740A2 (en) * 1990-10-16 1992-04-22 Puritan-Bennett Corporation Optical fiber PH microsensor and method of manufacture
EP0601816A2 (en) * 1992-12-11 1994-06-15 Puritan-Bennett Corporation CO2 Sensor using a hydrophilic polyurethane matrix
US5512492A (en) * 1993-05-18 1996-04-30 University Of Utah Research Foundation Waveguide immunosensor with coating chemistry providing enhanced sensitivity
US20020068019A1 (en) * 2000-12-06 2002-06-06 Fuji Xerox Co., Ltd. Sensor material, sensor and detection method for bio-substance
WO2004011525A1 (en) * 2002-07-30 2004-02-05 University Of Connecticut Nonionic telechelic polymers incorporating polyhedral oligosilsesquioxane (poss) and uses thereof

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0481740A2 (en) * 1990-10-16 1992-04-22 Puritan-Bennett Corporation Optical fiber PH microsensor and method of manufacture
EP0601816A2 (en) * 1992-12-11 1994-06-15 Puritan-Bennett Corporation CO2 Sensor using a hydrophilic polyurethane matrix
US5512492A (en) * 1993-05-18 1996-04-30 University Of Utah Research Foundation Waveguide immunosensor with coating chemistry providing enhanced sensitivity
US20020068019A1 (en) * 2000-12-06 2002-06-06 Fuji Xerox Co., Ltd. Sensor material, sensor and detection method for bio-substance
WO2004011525A1 (en) * 2002-07-30 2004-02-05 University Of Connecticut Nonionic telechelic polymers incorporating polyhedral oligosilsesquioxane (poss) and uses thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100451629C (en) * 2006-08-17 2009-01-14 中国船舶重工集团公司第七二五研究所 Preparation of optical fiber humidity sensor sensing membrane
US8837887B2 (en) 2011-08-03 2014-09-16 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Waveguide and connecting element

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